So as long as the position is properly controlled, you can hold the position indefinitely! I assume you mean the settlement time? Gold, silver, T+D all have settlement time. The daily settlement time is the closing time at 3: 30 pm, and then the bank will settle the daily profit and loss of investors every day, but you don't need to deliver the position, it will still exist!
Deferred delivery fee means that as long as you have positions that are not adjusted on the same day, you will incur deferred charges, but if you buy and sell on the same day and do not hold positions overnight, you will not incur deferred charges. The delay fee is two ten thousandths of the transaction amount, and the first-hand silver delay fee is about 1.